Numerical simulation of hydraulic characteristics of three-side inlet of vertical shaft inlet channel of horizontal pumping station
JIANG Hongying1, YAN Hongqin1, XIAO Zhongming2, CHENG Li3*, LIU Hao3
1. Hydraulic Engineering Science and Technology Consultation Limited Company of Jiangsu Province, Nanjing, Jiangsu 210029, China; 2. Jiuqu River Administration Office of Danyang City, Zhengjiang, Jiangsu 212000, China; 3. School of Hydraulic, Science and Engineering, Yangzhou University, Yangzhou, 1 Jiangsu 225009, China
Abstract：Aiming at the optimization design of the vertical shaft inlet passage adopted by a one-way horizontal diversion pump station, a three-side inlet shaft inlet passage is proposed. In order to analyze the hydraulic characteristics of the three-side inlet shaft inlet passage, based on the Rey-nolds time-averaged NS equation and k-ε standard turbulence model, the CFD technology is used to numerically simulate the three-side inlet shaft flow channel of the horizontal pumping station, and different three-side inlet channels are formed by controlling the line type and the width b of the middle pier, so as to analyze. The hydraulic characteristics of the different three-side inlet channel, specifically analyze the axial velocity distribution of the outlet section of the inlet flow channel of different schemes, the streamline and velocity distribution of the horizontal section, and the flow channel hydraulic loss. The results show that for the three-side inlet channel under different widths of the middle pier, the streamlined middle pier has a larger flow velocity distribution uniformity and the velocity-weighted average angle than the rectangular middle pier. The streamlined middle pier can obtain a better flow pattern. The streamlined middle pier, as the width b of the middle pier decreases, the cross-sectional area gradually increases, and the uniformity of the flow velocity distribution and the speed weighted average angle of each scheme gradually increase. When b=0.075B, The pressure distribution on the inlet section of the is streamlined middle pier pump more even than that of the rectangular middle pier.
